Effects of cell size, directional antennas, diversity and shadowing on indoor radio CDMA capacity

The paper presents the effects of directional antennas, cell size, diversity reception, log-normal shadowing, and path loss exponent on the reverse-link operated CDMA capacity. The simulation results show that a CDMA system with the directional antennas associated with smaller cell architecture suppresses the outside cell co-channel interference, resulting in significant capacity improvement. It is also found that two-branch antenna diversity reception at the base can improve the capacity by 2.2-2.3 times and the shadowing with a standard deviation of 10 dB decreases the capacity by 10-15% in comparison with that for 2 dB standard deviation